Depends on your definition of require. The flu doesn't require a vaccine, but if we had much higher vaccine uptake each year we would save hundreds of thousands of lives a year. It's possible that with really high vaccine uptake and other measures we could make the flu a lot more rare.

If we end up with a version of COVID that is less deadly and then we decide to not take vaccines seriously, we'll end up with endemic hundreds of thousands or millions of people dying every year. In the U.S., is an extra 100,000 dead a year something we should be OK with?